AN EXPERIMENT ON PROGRESS OF CHEMICAL CORROSION OF CONCRETE BY SULFURIC ACID AND NITRIC ACID

The purpose of this paper is to establish the estimating method of acid corrosion of concrete. The concrete specimens are soaked in sulfuric acid solution and nitric acid solution. The results of experiment are as follows.1) When the specimen soaked in sulfuric acid, the weight increased at first time and then decreased afterwards. Hard reactant occurs on the surface and it cannot be removed by washing. Big corrosion occurred when the water cement ratio is 30% and the pH of acid sulfuric is 1.5.2) When the specimen soaked in nitric acid, the weight decrease continued. Soft reactant occurred on the surface and it can be removed by washing.3) The progress of neutralization, accorded with corrosion of washed specimens.